From what I understand this is a PCRE extension issue with recursive regex. This error occured for me when the mediawiki filter was trying to parse a with the following regex:
#^\{\|(.*?)(?:^\|\+(.*?))?(^(?:((?R))|.)*?)^\|}#msi
From what I understand this is a PCRE extension issue with recursive regex. This error occured for me when the mediawiki filter was trying to parse a with the following regex: